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Westlake Village · Building on your lot

Building on a hillside in Westlake Village

Westlake Village's own rules on building on a hillside, with the code text for every value.

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Each rule below links to the section of the Westlake Village Municipal Code it was read from, with the code text one click away (checked October 2026). General information, not legal advice.

What Westlake Village's code says

Westlake Village code What Westlake Village's code adds
Soils or geology report
  • A detailed soils and geologic report must come with each grading permit application.
    Applies: Each grading permit application for hillside development.
    § 9.17.050 · code text
    A detailed Soils and Geologic Report shall accompany each Grading Permit application.
Grading and retaining walls
  • No manufactured slope may be more than 30 feet high between terraces or benches.
    Applies: Hillside development.
    § 9.17.050 · code text
    No manufactured slope shall exceed 30 feet in height between terraces or benches.
  • Free-standing walls that are part of a structure may be at most 6 feet high.
    Applies: Hillside development; same material and design as the structure.
    § 9.17.060 · code text
    The height of such walls shall not exceed six feet.
  • No more than 4 feet of solid wall or fence may show above the sight line along the slope.
    Applies: Walls and fences on slopes in hillside development.
    § 9.17.060 · code text
    Wall setbacks on slopes shall not allow more than four feet of solid wall or fence to show above the sight line projected along the slope angle.
  • Retaining walls at the base of slopes along roads may be at most 5 feet high.
    Applies: Hillside development.
    § 9.17.060 · code text
    Maximum wall height at the base of slopes along roadways shall not exceed five feet in order to avoid a contained, channel-like effect.

Who this affects

HomeownersContractorsDesigners

Frequently asked questions

What extra rules apply to a hillside lot in Westlake Village?

Westlake Village's code: No manufactured slope may be more than 30 feet high between terraces or benches. (Hillside development.) (§ 9.17.050); Free-standing walls that are part of a structure may be at most 6 feet high. (Hillside development; same material and design as the structure.) (§ 9.17.060).

General information, not legal advice.

Ask about a specific Westlake Village property

Ask GoCodebook how Westlake Village's building on a hillside rules apply to your situation and get an answer that cites the section.

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Westlake Village Municipal Code — full text